The Boson peak in confined water: An experimental investigation of the liquid-liquid phase transition hypothesis

被引：8

作者：

Mallamace, Francesco ^{[1
,2
,3
]}

Corsaro, Carmelo ^{[2
,3
]}

Mallamace, Domenico ^{[4
]}

Wang, Zhe ^{[1
]}

Chen, Sow-Hsin ^{[1
]}

机构：

[1] MIT, Dept Nucl Sci & Engn, Cambridge, MA 02139 USA

[2] Univ Messina, Dipartimento Fis & Sci Terra, I-98166 Messina, Italy

[3] Consiglio Nazl Ric IPCF Messina, I-98166 Messina, Italy

[4] Univ Messina, Dipartimento Sci Ambiente Sicurezza Terr Alimenti, I-98166 Messina, Italy

来源：

FRONTIERS OF PHYSICS | 2015年 / 10卷 / 05期

关键词：

supercooled water; liquid-liquid phase transition (LLPT); inelastic neutron scattering; DYNAMIC CROSSOVER TEMPERATURE; STOKES-EINSTEIN RELATION; GLASS-TRANSITION; SUPERCOOLED LIQUIDS; ANOMALOUS BEHAVIOR; NEUTRON; SCATTERING; PHONONS; ORIGIN; RAMAN;

D O I：

10.1007/s11467-015-0487-8

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The Boson peak (BP) of deeply cooled confined water is studied by using inelastic neutron scattering (INS) in a large interval of the (P, T) phase plane. By taking into account the different behavior of such a collective vibrational mode in both strong and fragile glasses as well as in glass-forming materials, we were able to determine the Widom line that characterizes supercooled bulk water within the frame of the liquid-liquid phase transition (LLPT) hypothesis. The peak frequency and width of the BP correlated with the water polymorphism of the LLPT scenario, allowing us to distinguish the "low-density liquid" (LDL) and "high-density liquid" (HDL) phases in deeply cooled bulk water. Moreover, the BP properties afford a further confirmation of the Widom line temperature T-W as the (P, T) locus in which the local structure of water transforms from a predominately LDL form to a predominately HDL form.

引用

页数：7

共 42 条

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